Welbeck out for "approximately 9 months." Next season pretty much written off and will be at least 19 months out in his first 3 years at the club. Terrible news and feel sorry for the guy but this is typical Arsenal. We sign a guy who isn't good enough to begin with, persist with him through injury, and now he'll miss another year of development. We'll never manage to get rid of him now.
Biggest fear is this means Walcott stays and then in January Wenger will use his return as a reason not to fix the forward issue he ignores this summer.